One candle is added to the menorah each night. The first night, you light only
the shammus (the one at a different height) and one Chanukkah candle. By the
eighth night, you light all of the candles.

Candles should be added to the menorah from right to left (like Hebrew
writing). See animation at right. The shammus candle is lit first. While
holding the shammus candle, recite the following blessings. They are usually
sung. Click the music icons in the blessings below to hear the tune.